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An Hamiltonian interface SPH formulation for multi-fluid and free surface flows

机译:用于多流体和自由表面流的哈密顿界面SPH公式

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摘要

In the present work a new SPH model for simulating interface and free surface flows is presented. This formulation is an extension of the one discussed in Colagrossi and Landrini (2003) and is related to the one proposed by Hu and Adams (2006) to study multi-fluid flows. The new SPH scheme allows an accurate treatment of the discontinuity of quantities at the interface (such as the density), and permits to model flows where both interfaces and a free surface are present. The governing equations are derived following a Lagrangian variational principle leading to an Hamiltonian system of particles. The proposed formulation is validated on test cases for which reference solutions are available in the literature.
机译:在本工作中,提出了一种用于模拟界面和自由表面流动的新SPH模型。该公式是Colagrossi和Landrini(2003)中讨论的公式的扩展,并且与Hu and Adams(2006)提出的用于研究多流体流的公式有关。新的SPH方案可以精确处理界面处的数量不连续性(例如密度),并可以对同时存在界面和自由表面的流动进行建模。控制方程是根据拉格朗日变分原理导出的,从而导致了粒子的哈密顿系统。在参考案例可从文献中获得的测试案例中,对提出的配方进行了验证。

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